linux-kernel - Re: [PATCHv14 00/17] Linear Address Masking enabling

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Message-ID: <Y8gjNAxBCYfbwAry@hirez.programming.kicks-ass.net>
Date:   Wed, 18 Jan 2023 17:49:56 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>, x86@...nel.org,
        Kostya Serebryany <kcc@...gle.com>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Taras Madan <tarasmadan@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        "H . J . Lu" <hjl.tools@...il.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        Bharata B Rao <bharata@....com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Ashok Raj <ashok.raj@...el.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv14 00/17] Linear Address Masking enabling

On Wed, Jan 11, 2023 at 03:37:19PM +0300, Kirill A. Shutemov wrote:

> Kirill A. Shutemov (12):
>   x86/mm: Rework address range check in get_user() and put_user()
>   x86: Allow atomic MM_CONTEXT flags setting
>   x86: CPUID and CR3/CR4 flags for Linear Address Masking
>   x86/mm: Handle LAM on context switch
>   mm: Introduce untagged_addr_remote()
>   x86/uaccess: Provide untagged_addr() and remove tags before address
>     check
>   x86/mm: Provide arch_prctl() interface for LAM
>   x86/mm: Reduce untagged_addr() overhead until the first LAM user
>   mm: Expose untagging mask in /proc/$PID/status
>   iommu/sva: Replace pasid_valid() helper with mm_valid_pasid()
>   x86/mm/iommu/sva: Make LAM and SVA mutually exclusive

+- the static_branch() thing,

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>